I have a Benelli SBE II that I shot #6 Hevi 3" with Gobblin' Thunder .655. That thing shot gorgeous patterns with that setup. I heard to not shoot Hevi through the choke so I called Kicks to get it right from the horses' mouth. The first time I called they said they don't recommend it but it would be o.k. The next year I made the same call and they said no, don't shoot hevi. through that choke. I called one more time the next year and they said don't shoot Hevi through it...I shot a lot of ammo through it in the years preceding those calls and during the year they said it was o.k. and it didn't seem to hurt anything...That being said, I wouldn't take the chance. Worse case somebody get their face blown off. Next worse, you ruin a bbl. Best case nothing happens but you always have that wonder if it's coming apart on the next shot...